Container rib



FIG. 1 is a top, front, right perspective view of a container rib showing our new design;

FIG. 2 is a front, left perspective view thereof;

FIG. 3 is a front, right perspective view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is an enlarged top, front, right perspective view with unclaimed subject matter omitted thereof; and,

FIG. 8 is an enlarged right side view with unclaimed subject matter omitted thereof.

The broken lines in the drawing depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a container rib, as shown and described. 